Adjustable stove-grate



(No Model.)

H. W. BGDEMAN.

ADJUSTABLE STOVE GRATE.

Patented May l0 jfigd?.

Nrrnn SrA'rns f ATENT firmen.

ADJUSTABLE sTove-GRATE.

SPECIFICATION forming part of Letters Patent No. 362.919, dated May 10, 1887.

Application filed September 30, 15S-i3. Renewed April l. 1887. Serial Xo. 238,314. (No model.)

To aZZ whom it may concern.-

Be it known that I, HENRY WiLLiAM Bonn- MAN, a resident of the city and county of San Francisco, State of California, have invented a new and useful Adjustable Stove-Grate; and I hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings.

1o My invention relates to means for adjusting a stove-grate, whereby the area of the tire-box may be lessened and the consumption of fuel reduced.

The following description fully explains the nature of my said invention and the manner in which I proceed to construct, apply, and operate the same, the accompanying drawings being referred to by igures and letters-that is to say:

2o Figure l is a perspective view of the device applied, showing its attachment. Fig. 2 is a longitudinal section through the stove,the dotted lines showing the movement of the grate. Fig. 3 is a plan view ofthe device, looking up from underneath.` Fig. 4t is a front view of the grate frame with a curved depression, showing the lugs attached.

Referring to Fig. l, alug, c, is formed with or secured to both sides of the rear of the grateframe b, and a lug, d, to both sides of the front of the same, and a lug, e, is bolted to both ends of the rear of the grat-e f. To these lugs, which have slots, I attach the side bars. The outer side bar, g, is in the form of a parallelogram open at the rear end, where the points ofthe bars enter` the slots in the lugs c, and are pivoted therein on bolts. side bars, h, are pivoted on bolts in lug c on the'grate, and at the front they enter slots in 40 lug d, in which they have free action. The

side bars on both sides of the grate are pivoted in the center on bolts z, and have the aetion of scissor-blades. The adjusting-lcvcrj, on the arm of which I arrange several points,

7c, in line, enters a round hole, n, having a square cut on top in the vertical plate of the stove and passes through a curved depression, o, in the grate-frame, and thence to the crossbar of the leverframe Z, through the loop or 5o hole in which it passes loosely,and is secured by a nut, m, Figs. l and 3. The ends of the bars forming the lever-frame pass over the inner side bar, 7i, and enter holes in the sides of the outer side bars, g, Figs. l and 3.

5 5 In the operation ot' my adj ustablc grate, if

The inner it is desired to raise the grate from the bottom of the tire-box, Fig. 2, the lever j is turned to the left to disengage the point k from the vertical plate of the stove and permit it to enter the square cut over the top ot' the round hole n, and the lever is then pulled forward. This action raises the side bars, whereby the grate is raised one-eighth or one-fourth or one half ot the depth of the fire-box, as may be desired` and when the grate has been adjusted the lever is turned to the right and one of the points k catches against the vertical plate and holds the lever at the point of adjustment. Vhen it is desired to lower the grate and to enlarge the area of the {ire-space, the lever is turned to the left and then pushed inward until the desired point is reached, and is then turned to the right again, and is held in posi? tion by one of the points on its arm. The action of the lever and the lever-frame as they are drawn outward or pulled inward raises or lowers'the side bars, which are bolted to lugs at the rear and have free action at the front, evenly on the central pivot-bolts, i, and when the grate is adjusted the lever is held securely and maintains the grate in a level position.

rIhe object of device is to reduce the `consumption of fuel by diminishing the area of the nre-box, and I accomplish this object by simple and inexpensive means.

Il" a common cooking stove or range has not been originally supplied with the device, it may be applied to either by removing the lin ing of the lire-box and then drilling holes in the grate and grate-'frame for bolting t-he lugs thereto, and cutting the holes in the stove vertical plate for the lever.

Having thus fully described lny invention, what l claim, and desire to secure by Letters Patent, is#- Thc combination of the stoveplate having the opening fn, the lever j, having the points k, the lever-frame Z, thcgrate-frame b, having a depression, o, the side bars, g 7L, pivoted to the grate-frame and end ofthe grate, respectively, and pivoted together centrally, and the grate, all substantially as and for the purpose set forth.

In testimony whereof I have hereunto set my hand and seal.

[L1 SLI 

